yes, there is a passage that leads from the float bowl to the primer bulb, you will need to remove the primer bulb, and try to clear it. thing is, unless your living in zero temps ?, I hardly ever use, much less see any one use this primer bulb.Carb rebuild had to replace primer pump due to corrosion. So on the float bowl what supplies fuel to the primer bulb. The main passage is clear but when I fill the bowl with fluid the primer pump is not drawing fluid from the bowl. It appears some other passage is blocked.